Orictites tubercucollis, Balkenohl, 2017

Balkenohl, Michael, 2017, Revision of the genus Orictites ANDREWES, 1931 (Coleoptera, Carabidae, Clivinini), Contributions to Natural History 35, pp. 1-68 : 53-57

Orictites tubercucollis sp. nov.

Type material: Holotype: ♂, labels: white, black printed: “ Thailand 14.8.1995 (Chiang Mai) Doi Suthep Pui NP R. Grimm” ( CBM-ZSM).

Remark: In the holotype some antennomeres are missing at one side.

Paratypes: 1 ♂, “ Thailand, NWW Chiang Mai, Doi Suthep. 1200 m, 7.–10.5.2004, R. Grimm ” ( CBB) ; 1 ♀, “ Sarawak Kuching.Bako NP 27.–29.3.1990 leg. A.Riedel ” ( CBM- ZSM) ; 1 specimen: “ INDONESIA; Borneo Kalimantan Tengah Busang / Rekut confl. 0°03´S, 113°59´E / Brendell / Mendel August 2001 General collecting / 2001–191´Barito Ulu 2001´ BMNH (E)” ; 3 specimens: “ LAOS –NE, Xieng Khouang prov.,~19°37–8´N 103°20´E, Phonsavan (30km NE): Phou Sane Mt. ,~ 1400–1500m, 10.–30.v.2009, Z. Krauss leg. / NHMB Basel Prague Laos 2009 Expedition: M. Brancucci, M. Geiser, Z. Krauss, D. Hauck, V. Kubáň ( NHMB, CBB)“ ; 2 specimens: “ LAOS –NE, Xieng Khouang prov.,~ 19°26´N / 103°13´E, Phonsavan town to Phou Padaeng , 1100–1200m, 30.–31.v.2009, M. Geiser leg. / NHMB Basel, NMPC Prague Laos 2009 Expedition: M. Brancucci, M. Geiser, Z. Krauss, D. Hauck, V. Kubáň ( NHMB, CBB)“ ; 1 ♂, 1 specimen, “ LAOS –NE, Xieng Khouang prov.,~19°37–8´N 103°20´E, 30km NE Phonsavan: Ban Na Lam  Phou Sane Mt. , 1300–1500m, 10.–30.v.2009, M. Brancucci leg. / NHMB Basel NMPC Prague Laos 2009 Expedition: M. Brancucci, M. Geiser, Z. Krauss, D. Hauck, V. Kubáň ( NHMB)“ ; 1 ♀, “ Tonkin Hanoi Feb. 1917 R.V.de Salvaua. / Clivina sp. / Brit. Mus. 1921–89 ( BMNH)“ . 1 specimen: “Coll. I.R.Sc.N.B. BORNEO:ca 420km NEE Pontianak, Ca. 30km NNE Putussibau, 1°08´N, 113°00´E, 23–28–XII–2008 I.G.31.412. Leg A.Napolov “ ( IRSNB) .

Description ( Figs 12 , 29 , 39; pp. 10, 25, 37)

Measurements (n = 9): Body length 5.3–6.52 mm, ( = 5.85 mm), width 1.42– 1.9 mm ( = 1.67 mm), ratio length/width of pronotum 0.93–1.01 ( = 0.97), ratio length/width of elytra 1.74–1.93 ( = 1.88).

Colour: Shiny. Black to dark-brown. Wings of clypeus and supraantennal plates dark-brown, slightly transparent in one paratype, antennae and labrum dark-brown, palpi yellowish brown, legs dark red-brown.

Head: A fifth narrower than pronotum. Clypeus with small rounded tooth laterally, nearly fused with wings, anterior margin slightly excised, with blunt raised knob between the two clypeal setae, anteriorly with some rugae, posterior part of knob covered with big punctures and rugae, margin of wings convex, slightly hollowed out, divided from middle part of clypeus by slight notches and carinae, divided from supraantennal plates by distinct obtusely angled notches and ridge, clypeus and wings reflexed margined, supraantennal plates vaulted up to mid-eye level, smooth, with reflexed rounded margin, elongated as supraorbital carina, frons separated from clypeus by flat transverse depression and transverse rugae, with costate, nearly parallel running frontal carinae at each side posteriorly, with broad furrow between frontal carina and supraorbital carina, sharp furrow between frons and frontal carina, frons moderately convex, with very minute and scattered punctures. Supraorbital setae located in broad furrows between supraorbital carina and frontal carina, the posterior one arising from tubercle. Eyes of moderate size, flattened but still convex, genae enlarged, regularly rounded, not as high as and shorter than eyes, enclosing eyes posteriorly, forming obtuse angle at neck. Grooves for reception of antennae short, length 0.4 of eye diameter. Neck constriction marked as distinct step, with bigger punctures connected line-like, neck laterally covered with reticulation and densely scattered medium sized punctures. Labrum straight, 7-setose, ciliate laterally, with isodiametric reticulation. Mandibles robust, shorter than head, flattened, stout, broadened at base, acutely curved at apex, carinae of scrobe complete, both mandibles obtusely angled towards base (opened position), and both somewhat hollowed out dorsally. Maxilla distinctly curved, acutely hooked at apex. Apical maxillary palpomere slender, slightly securiform. Apical labial palpomere slender, straight, slightly longer than 2 nd segment, 2 nd segment bisetose. Ventral surface of neck covered with punctures and some reticulation. Submentum and mentum distinctly separated; submentum with four bigger, about equally spaced setigerous punctures; mentum at base bilaterally with rounded elevation, with some longitudinal carinae, with fine and complete reflexed margin, lateral lobes projecting, nearly right-angled at tips, with a seta near base of each lobe, median tooth forming broad obtuse triangle, bisetose, not projecting as far as lateral lobes. Antennae of moderate length, reaching distinctly over middle of pronotum, scapus knee-like angled, with one seta dorsoapically, scapus and pedicellus with fine reticulation, segments 5–10 subelongate (L/ W 1.4), antennomeres slightly flattened, with shiny areas on flattened parts, segments 4–11 densely pubescent, with a few additional long setae.

Pronotum: Square, thought slightly transverse, sides slightly convex at middle, distinctly rounded in anterior quarter to anterior angles. Anterior margin slightly bisinuate. Reflexed lateral margin with some fine scars in anterior part. Margin from posterior angle to base running as slightly convex line, with a distinct tubercle bilaterally at base. Lateral channel conspicuously broad between the two lateral setigerous punctures, with isodiametric reticulation and very few irregular punctures. Anterior setigerous puncture located at the end of anterior fifth adjoining convexity of pronotum, the posterior one located at level of posterior angle, removed from lateral channel by diameter of pore. Anterior angles projecting, rounded, formed by reflexed lateral margin, posterior angle developed as sharp distinct tooth, projecting antero-laterally. Anterior transverse line formed by distinct, partly connected punctures. Median line deep and conspicuously broad, rugose, running up to level of anterior transverse line but not joining, smaller at base, adjoining base. Surface irregularly covered with big punctures and with irregular reticulation laterally and at base, basal impression short but well visible, basal channel broad, deep. Flange raised keel-like (lateral view).

Elytra: Subcylindrical, sides slightly diverging, marginal channel broad, visible from above, with uninterrupted row of big setigerous punctures arising from broad tubercles. Reflexed margin with fine crenulation in anterior third, margin slightly thickened at humerus, bending with channel over rounded humerus up to 5 th stria. Humerus with distinct rounded tooth. Basal tubercle distinct, with setigerous puncture, situated at declivity of 1 st stria. Striae 1–4 free at base, all striae deep, distinctly punctate, striae 1 and 2 ending free at apex, 3–4 and 5–6 joined apically; striae 6 and 7 shortened at humerus. Striole distinct, interval between striole and sutura costiform, raised. All intervals conspicuously convex, thought costate, 3 rd and4 th broader and raised at base, both with tubercle at base, 8 th carinate. All intervals shiny on disc. Interval 3 with four setigerous punctures adjoining stria 3.

Hind wings: Fully developed.

Ventral surface: Epipleuron shiny, covered with big scattered punctures and indistinct reticulation, submarginal furrow distinct. Proepisternum and episternum with punctures, prosternite slightly punctured, keeled at middle, mesosternum nearly smooth. Sternites with transverse to isodiametric reticulation, each with big punctures at base, denser laterally, 3 rd to 5 th with paralateral ambulatory setae at each side, ventral strigae distinct, sternite 6 smooth at middle, with two widely separated apical setae at each side.

Legs: Anterior tibia with strong digitation, with two big and one small lateral preapical denticles, apical spine curved distinctly towards ventral, no dorsal furrow, basal tarsomere elongated, as long as the following four together. Mesotibia with preapical spine, furnished with strong seta. All tarsomeres relatively broad.

Male genitalia ( Fig. 29 ): Relatively long, moderately sclerotized. Median lobe slender, moderately arcuate, spatula slightly distorted and broadened. Endophallus strongly folded, teeth not visible. Parameres of about same length, both slender, longer than median lobe (in natural position), slightly twisted, with minute pili at the apical tip.

Remarks: The minute setae on the apical tip of the parameres are sensitive and tend to break during mounting. The setigerous punctures are minute so that high magnification is needed.

Female genitalia ( Fig. 39 ): Coxostylus slender, slightly sigmoid, dorso-ventrally moderately depressed, gently curved to apex, with obtuse knob-like tooth laterally at base, with two setae apically close together, with one short and blunt robust ensiform seta, and one acute short ensiform seta, both of them in middle part, with four nematiform setae in the middle part and towards base.

Variation: Besides the total length, slight differences in coloration, and the degree in punctation on the ventral surface, there was no variation observed.

Diagnosis: A medium-sized black species with distinct knob on the clypeus and distinct flat transverse depression with rugae behind, with distinct but rounded humeral tooth, tubercles at the base of intervals 3 and 4 of the elytra, and four setigerous punctures on interval 3. In addition, the female coxostylus exhibits two ensiform setae in the middle part. Distinguished from all other species by the presence of a bilateral tubercle on the reflexed margin at the base of the pronotum.

Distribution. The species was collected in Thailand, Laos, and Borneo.

Collecting altitudes were between 1000 and 1500 metres.

Etymology: The name refers to the tubercles on the reflexed margin at the base of the pronotum.

Figures

Figs 9–12: Orictites spp., habitus. 9: O. barclayi sp. nov., holotype, female; 10: O. brancuccii sp. nov., holotype, male; 11: O. barclayi minorfrater ssp. nov., holotype, male; 12: O. tubercucollis sp. nov., holotype, male.

Figs 27–30: Orictites spp., aedeagus, ventral view. 27: O. brancuccii sp. nov., holotype, scale bar 0.2 mm; 28: O. barclayi minorfrater ssp. nov., holotype, scale bar 0.2 mm; 29: O. tubercucollis sp. nov., holotype, scale bar 0.2 mm; 30: O. anteriorlatus sp. nov., holotype, scale bar 0.2 mm.

Figs 39–40: Orictites spp., coxostylus. 39: O. tubercucollis sp. nov., scale bar 0.1 mm; 40: O. charleshuberi sp. nov., scale bar 0.1 mm.